EP1281460A4 - Niobium powder, sintered compact thereof and capacitor - Google Patents

Niobium powder, sintered compact thereof and capacitor

Info

Publication number
EP1281460A4
EP1281460A4 EP01921995A EP01921995A EP1281460A4 EP 1281460 A4 EP1281460 A4 EP 1281460A4 EP 01921995 A EP01921995 A EP 01921995A EP 01921995 A EP01921995 A EP 01921995A EP 1281460 A4 EP1281460 A4 EP 1281460A4
Authority
EP
European Patent Office
Prior art keywords
capacitor
niobium powder
oxygen
sintered compact
niobium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01921995A
Other languages
German (de)
French (fr)
Other versions
EP1281460B1 (en
EP1281460A1 (en
Inventor
Kazumi Naito
Nobuyuki Nagato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Resonac Holdings Corp
Original Assignee
Showa Denko KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=18633121&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1281460(A4) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Showa Denko KK filed Critical Showa Denko KK
Publication of EP1281460A1 publication Critical patent/EP1281460A1/en
Publication of EP1281460A4 publication Critical patent/EP1281460A4/en
Application granted granted Critical
Publication of EP1281460B1 publication Critical patent/EP1281460B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/04—Electrodes or formation of dielectric layers thereon
    • H01G9/048—Electrodes or formation of dielectric layers thereon characterised by their structure
    • H01G9/052—Sintered electrodes
    • H01G9/0525—Powder therefor
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B34/00—Obtaining refractory metals
    • C22B34/20—Obtaining niobium, tantalum or vanadium
    • C22B34/24—Obtaining niobium or tantalum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/045—Alloys based on refractory metals
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
    • C22C27/02—Alloys based on vanadium, niobium, or tantalum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2991—Coated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Powder Metallurgy (AREA)
  • Ceramic Capacitors (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Disintegrating Or Milling (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Soft Magnetic Materials (AREA)

Abstract

A niobium powder for use in a capacitor, characterized in that it comprises a niobium powder being partially oxydized and partially nitrized which has a mass ratio of the amount of nitrogen to that of oxygen of 1/45 or more; a sintered compact of the niobium powder; and a capacitor using the sintered compact. A conventional niobium capacitor has had low reliability, since a conventional niobium powder has great affinity for oxygen and is prone to natural oxidation. The use of the above niobium powder containing nitrogen in addition to oxygen in a mass ratio of nitrogen to oxygen of 1/45 or more has allowed the production of a highly reliable niobium capacitor which causes no spike noise in the reliability test (high temperature and high load test).
EP01921995A 2000-04-24 2001-04-23 Niobium powder, sintered compact thereof and capacitor Revoked EP1281460B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2000122672 2000-04-24
JP2000122672 2000-04-24
PCT/JP2001/003448 WO2001081029A1 (en) 2000-04-24 2001-04-23 Niobium powder, sintered compact thereof and capacitor

Publications (3)

Publication Number Publication Date
EP1281460A1 EP1281460A1 (en) 2003-02-05
EP1281460A4 true EP1281460A4 (en) 2006-07-26
EP1281460B1 EP1281460B1 (en) 2008-03-12

Family

ID=18633121

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01921995A Revoked EP1281460B1 (en) 2000-04-24 2001-04-23 Niobium powder, sintered compact thereof and capacitor

Country Status (9)

Country Link
US (1) US6671164B2 (en)
EP (1) EP1281460B1 (en)
JP (1) JP4986272B2 (en)
CN (1) CN1226112C (en)
AT (1) ATE388779T1 (en)
AU (1) AU2001248826A1 (en)
BR (1) BR0110333A (en)
DE (1) DE60133192T2 (en)
WO (1) WO2001081029A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6755884B2 (en) * 2000-11-30 2004-06-29 Showa Denko K.K. Niobium powder for capacitor, sintered body thereof and capacitor using the sintered body
JP2004143477A (en) * 2002-10-22 2004-05-20 Cabot Supermetal Kk Niobium powder and production method therefor, and solid electrolytic capacitor obtained by using the same
US20060260437A1 (en) * 2004-10-06 2006-11-23 Showa Denko K.K. Niobium powder, niobium granulated powder, niobium sintered body, capacitor and production method thereof
MX2007016540A (en) * 2005-06-03 2008-03-11 Starck H C Gmbh Niobium suboxides.
JP5763932B2 (en) * 2011-02-02 2015-08-12 Ｎｅｃトーキン株式会社 Solid electrolytic capacitor and manufacturing method thereof
CN113770366A (en) * 2020-06-10 2021-12-10 安泰科技股份有限公司 Method for preparing refractory metal powder for 3D printing

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0665302A2 (en) * 1994-01-26 1995-08-02 H.C. Starck, INC. Nitriding tantalum powder
US5448447A (en) * 1993-04-26 1995-09-05 Cabot Corporation Process for making an improved tantalum powder and high capacitance low leakage electrode made therefrom
JPH11329902A (en) * 1998-05-15 1999-11-30 Nec Corp Solid electrolytic capacitor and manufacture thereof
US6051044A (en) * 1998-05-04 2000-04-18 Cabot Corporation Nitrided niobium powders and niobium electrolytic capacitors

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1219748A (en) 1969-06-13 1971-01-20 Standard Telephones Cables Ltd Producing niobium or tantalum powder
US4084965A (en) 1977-01-05 1978-04-18 Fansteel Inc. Columbium powder and method of making the same
US4149876A (en) 1978-06-06 1979-04-17 Fansteel Inc. Process for producing tantalum and columbium powder
JPS60121207A (en) 1983-12-01 1985-06-28 Toyo Soda Mfg Co Ltd Manufacture of hyperfine particle
JP2665928B2 (en) * 1988-03-25 1997-10-22 昭和キャボットスーパーメタル株式会社 Tantalum powder and method for producing the same
DE3820960A1 (en) 1988-06-22 1989-12-28 Starck Hermann C Fa FINE-GRAINED HIGH-PURITY EARTH ACID POWDER, METHOD FOR THE PRODUCTION AND USE THEREOF
JPH0239417A (en) * 1988-07-28 1990-02-08 Marcon Electron Co Ltd Manufacture of electrolytic capacitor
US4964906A (en) * 1989-09-26 1990-10-23 Fife James A Method for controlling the oxygen content of tantalum material
JPH03150822A (en) 1989-11-07 1991-06-27 Nippon Chemicon Corp Aluminum electrode for electrolytic capacitor
JP3106559B2 (en) 1991-07-05 2000-11-06 日本ケミコン株式会社 Method for producing base material having metal oxide on surface
US6165623A (en) 1996-11-07 2000-12-26 Cabot Corporation Niobium powders and niobium electrolytic capacitors
JP3254163B2 (en) * 1997-02-28 2002-02-04 昭和電工株式会社 Capacitor
DE69840770D1 (en) * 1997-11-28 2009-06-04 Showa Denko Kk FEES
US6171363B1 (en) 1998-05-06 2001-01-09 H. C. Starck, Inc. Method for producing tantallum/niobium metal powders by the reduction of their oxides with gaseous magnesium
US6072694A (en) * 1998-09-30 2000-06-06 Kemet Electronics Corporation Electrolytic capacitor with improved leakage and dissipation factor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5448447A (en) * 1993-04-26 1995-09-05 Cabot Corporation Process for making an improved tantalum powder and high capacitance low leakage electrode made therefrom
EP0665302A2 (en) * 1994-01-26 1995-08-02 H.C. Starck, INC. Nitriding tantalum powder
US6051044A (en) * 1998-05-04 2000-04-18 Cabot Corporation Nitrided niobium powders and niobium electrolytic capacitors
JPH11329902A (en) * 1998-05-15 1999-11-30 Nec Corp Solid electrolytic capacitor and manufacture thereof
US6215652B1 (en) * 1998-05-15 2001-04-10 Nec Corporation Solid electrolytic capacitor and manufacturing method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 02 29 February 2000 (2000-02-29) *

Also Published As

Publication number Publication date
CN1433346A (en) 2003-07-30
WO2001081029A1 (en) 2001-11-01
CN1226112C (en) 2005-11-09
EP1281460B1 (en) 2008-03-12
US6671164B2 (en) 2003-12-30
DE60133192D1 (en) 2008-04-24
BR0110333A (en) 2003-01-07
JP4986272B2 (en) 2012-07-25
DE60133192T2 (en) 2009-03-12
ATE388779T1 (en) 2008-03-15
EP1281460A1 (en) 2003-02-05
AU2001248826A1 (en) 2001-11-07
US20020075629A1 (en) 2002-06-20

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